Perhaps you should try some spelling variations:
"van thong tin snippets" » "van thuong tin snippets", "van phong tin snippets", "va thong tin snippets", "van thong tin slippers", "van thong tinh snippets"
"python using a snippets" » "python using a slippers"
"locating bug code snippets" » "locating bug code slippers", "locatinhg bug code snippets", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using a snippets") or ("van thong tin snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using a snippets") OR ("van thong tin snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("python using a snippets") or ("van thong tin snippets"))) or ("locating bug code snippets"))*.